a

b

c

d

e

f

g

h

i

j

k

l

m

n

o

p

q

r

s

t

u

v

w

x

y

z

ANTIBIOTIC

Definition

(1) Originally, any microbial product which, in low concentrations (of the order of µg/ml), can inhibit or kill (susceptible) microorganisms. (2) Currently, 'antibiotic' is generally used to refer to natural semi-synthetic and wholly synthetic antimicrobial compounds which are effective at low concentrations. In aquaculture antibiotics are usually administered as chemotherapeutic agents; in nature many or all antibiotics may have important ecological roles. Within the microorganism a given antibiotic characteristically acts at specific target site(s).

English French Spanish Greek Norwegian Polish Hungarian Turkish Galician